[Glitch] Redirect on success for standalone compose

Port 1675eab561 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/compose/components/compose_form.jsx

@@ -81,6 +81,7 @@ class ComposeForm extends ImmutablePureComponent {
     singleColumn: PropTypes.bool,
     lang: PropTypes.string,
     maxChars: PropTypes.number,
+    redirectOnSuccess: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -336,7 +337,7 @@ class ComposeForm extends ImmutablePureComponent {
                 >
                   {intl.formatMessage(
                     this.props.isEditing ?
-                      messages.saveChanges : 
+                      messages.saveChanges :
                       (this.props.isInReply ? messages.reply : messages.publish)
                   )}
                 </Button>